Existen pocas referencias de las características del espermatozoide de Romerolagus diazi o zacatuche, conejo mexicano, considerado primitivo y en peligro de extinción. El objetivo del presente estudio fue realizar la morfometría ultraestructural de sus espermatozoides de cola de epidídimo para ampliar el conocimiento sobre su biología reproductiva y la de...
Este estudio se realizó con la finalidad de evaluar la pérdida de la asimetría fosfolipídica de la membrana plasmática de la cabeza de espermatozoides de cola de epidídimo de conejo, durante la evolución de los procesos de capacitación y reacción acrosomal haciendo uso de la unión específica de la Anexina...
Sperm undergo a complex process called capacitation during their journey through the female reproductive tract. In this process, a set of biochemical events occurs that have the purpose of fertilization. Some toxic compounds can interfere with this process, including perfluoroalkyl substances (PFAS) or also called perfluorinated compounds (PFCs), such as...
Capacitation is a set of biochemical and physiological changes that occur in spermatozoa during their transit along the female reproductive tract that are necessary to become cells able to fertilize the female gamete. Although several mechanisms related to capacitation have been studied, such as the increase of tyrosine phosphorylation, there...
Debido a que existen limitaciones para establecer los efectos específicos de un herbicida sobre las diferentes funciones de un organismo, es necesario el uso de modelos de estudio tanto in vivo como in vitro. El Fenoxaprop-Etil (FE) es un herbicida de uso común y aunque no hay reportes sobre su...
Sperm in the female's reproductive tract undergo changes known as sperm capacitation, a requirement to fertilize the oocyte; the redox system regulates these changes. On the other hand, some assisted reproductive technologies to require capacitation in vitro conditions; and the use of antioxidants has been necessary, which can modify the...
The surface of the spermatozoa is coated with glycoproteins, the redistribution of which during in vitro capacitation plays a vital role in the subsequent fertilization process. Lipid rafts are membrane microdomains involved in signal transduction through receptors and include or recruit specific types of proteins and glycoproteins. Few studies have...
Los espermatozoides al transitar por el epidídimo tienen cambios bioquímicos como parte de su maduración; entre ellos, es necesario que se generen cambios en la membrana plasmática que den paso al ensamblaje y la remodelación de los carbohidratos N-acetilglucosamina, ácido siálico, manosa y fucosa, que son agregados a la superficie...
Mammalian sperm are motile after ejaculation, but cannot fertilize the egg. This ability is acquired during passage through the female reproductive tract and it is called sperm capacitation. In this process the activation of both, a bicarbonate (HCO₃- ) dependent adenylate cyclase and a protein kinase A (PKA) allow tyrosine...
